Women are the weaker sex. This has always been taught by the Church.
Bishop George Hay, addressing husbands on how to love their wives, plainly shows us that women are the weaker sex. I posted this elsewhere. https://www.cathinfo.com/catholic-living-in-the-modern-world/duties-of-husband-and-wife/msg1022825/?topicseen#msg1022825
Consider that God has given you superiority over them, not only in authority, but also in fortitude and strength of mind, in knowledge and other respects, and therefore you ought to honour them as the weaker vessels, by a more tender love and greater condescension for them, remembering also that they are co-heirs with you of eternal life...